Cut chicken breast into 1-inch pieces.
In a large bowl, add chicken breast, garlic powder, salt and pepper then toss to coat.
Melt 2 tbsp butter in a jumbo cooker or skillet over medium heat. Add half of the chicken and cook for approximately 4 minutes, until the chicken is golden-brown.
Flip the chicken and cook for an additional two minutes, or until both sides are cooked through. Remove from heat and place on a plate.
Repeat with the other half of the chicken using 1 tbsp of additional butter. When done, remove from heat and place on the same plate previously used.
Reduce heat to low. Add the last 1 tbsp butter, garlic and chicken to the skillet or jumbo cooker. Cook until the butter melts and the garlic is fragrant. Approximately 1 minute.
Remove from skillet or jumbo cooker and toss in Parmesan cheese before serving.